Improvement in door-knobs



H. H. ELWELL.

Dour-Knobs.

N0. 142,451. 'PatentedSeptemberL1873.

iff

ATES I HENRY H. ELWELL, OF SOUTH NORWALK, CONNECTICUT, ASSIGNOR TO THE NORWALK LOCK COMPANY, OF SAME PLACE.

IMPROVEMENT IN DOOR-KNQBS.

Specification forming part of Letters Patent No. 142,415l, dated September 2,1873; application filed Y July 2, 1873.

To all whom it may concern:

Be it known that I, HENRY H. ELWELL, of South Norwalk, in the county of Fairfield and State of Connecticut, have invented a new Improvement in Door-Knobs; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of. the same, and which said drawings constitute part of this specification, and represent, in

ligure 1, a side View; Fig. 2, a longitudinal action; and in Fig. 3, a longitudinal section of the usual construction.

. This invention relates to an improvement in that class of knobs for doors which are made from composition.

Heretofcre the construction has been as seen in Fig. 3. A barrel or sleeve is made, upon which the composition is pressed, and this is reduced at the'end from-c outward, and so as to form a bearing, b, in order that a metal surface may be attained at all bearingpoints. This necessitates a very large neck for the knob, and also necessitates the construction of a rose corresponding thereto, as seen in Fig. 3, so that the knob will not fit any rose not expressly made for it, and a very long screw is required to attach the knob to the spindle, and the bearing of the screw must necessarily come in the material of which the knob is composed, frequently causing the burstingor iiakin g of the neck.

Thcobject of this construction is to make the knob with a neck no larger than the necks of other classes of knobs; and it consists in forming a base or barrel for the knob with a iiange at the outer end of the diameter of the neck, and with a socket for the screw projecting from the barrel to the surface of the neck and the materiall compressed thereon, making the diameter of the vneck equal to the-diameter of the ilange, and the end of the neck protected by the flange, as more fully hereinafter described. n

I form the barrel B, as denoted 'in solid black, Fig. 2, with an opening, A, into it longitudinally to receive the spindle, and with a iiange, d, around its outer end, its extreme inner end roughened or made uneven to hold the composition, and With a socket, e, for the screw projecting from the barrel; then onto this, in suitable molds, I form the composition into the shape required for the knob, as seen in Fig. 2, the diameter of the neck corresponding to the diameter of the ange d, and substantially to the diameter of other knobs of the same dimensions. The ilange d forms the bearing in the rose, and will tit any rose of the usual construction. bearing in the metal socket e, and therefore has no tendency to injure the knob, and this construction uses less material and is much more symmetrical in its appearance than the usual construction seen in Fig. 3, and also avoids the construction of a rose especially for it.

I claim as my inventioni The barrel B as a base upon which to form a composition knob, when the said barrel is constructed with the flange d and with the screw-socket c, substantially as set forth.

HENRY H. ELWELL.

Witnesses EDWARD BEARD, WILLIAM T. GRAW.

The screw takes its 

